RX signal weak

[Yuz]

I got the following result, but I don;t know why it cannot draw the point on the gnuplot and the results in rx file are all zero.

tx_file

rx_file

gnuplot

[yt7pwr]

Never work with GNU plot but you have defined it differently: rx_stream.dataFmt (12bit) and buffer (rx_buffer as 32bit float). TX definition is identical.

[Yuz]

Thanks. I just begin to learn SDR. I have received data on the gnuplot as followings.
TX gnuplot

RX gnuplot

But the point in TX has phase shift, and points in RX are still around zero. (Problem nan has been solved.)
RX file